Fuel Delivery Couplings Gravity Drop Couplings 4″ Gravity Drop Coupler (6″ API) with 4″ Female BSP Thread.Nylon and Aluminium Dust plugs and spares available. 4″ Gravity Drop Coupler (6″ API) to 4″ Male Camlock4″ Gravity Drop Coupler (6″ API) to 3″ Male Camlock Barrett Hose Couplings4″ HOSE COUPLING 12 TOOTH PETROL with lanyard and Dust plug4″ HOSE COUPLING 18 TOOTH DIESEL with lanyard and Dust plug 12 TOOTH FEMALE (Bottom of handle) x 18 TOOTH MALE (Top of handle) CONVERTER18 TOOTH FEMALE (Bottom of handle) x 12 TOOTH MALE (Top of handle) CONVERTER Spare Brass Male adapters available 18 & 12 Tooth Spare Brass Female locking rings 12 & 18 tooth available. UV Protected Barrett Hose coupling Dust Cap *please note this is not meant to withhold pressure from within the hose, it is merely to keep dust out between loading and offloading